Long-run purchasing power parity and long-term memory: evidence from Asian newly industrialized countries

Fractional cointegration in a trivariate model is used to test the long-run purchasing power parity hypothesis in four Asian newly industrialized economies. Critical values for the Geweke-Porter-Hudak tests based on Monte Carlo simulations are provided. Evidence of fractional cointegration arises when a linear trend is included. Subperiod analysis indicates that a shift in the exchange rate regime is likely to affect the results of cointegration tests.